Appeal No. 1997-2474 Page 14
Application No. 08/125,590
Claim 26 specifies in pertinent part the following
limitations:
A digital signal processing apparatus for
performing an inverse discrete cosine transform,
comprising:
...
means for outputting a digital output signal
including a sequence of output values;
...
a control store of central processing unit
instructions ... including instructions to sum
values to obtain parts of the output values
corresponding to a plurality of symmetry classes
....
The examiner fails to show a teaching or suggestion of
the limitations in the prior art. To the contrary, he admits
that the sole reference relied on to reject the claim, viz.,
McMillan, “does not disclose the symmetry characteristic ....”
(Examiner’s Answer at 4.) The admission negates a prima facie
case of obviousness. Therefore, we reverse the examiner’s
rejection of claim 26 under 35 U.S.C. § 103.
Each of claims 14-23 specifies in pertinent part the
following limitations concerning symmetry:
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